Second wild idea of the day:
The dict constructor currently accepts sequences where each element has
length 2, interpreted as a key-value pair.
Let's have it also accept sequences with elements of length 1, interpreted
as a key:None pair.
The benefit is that it provides a way to rapidly construct sets:
lowercase = dict('abcdefghijklmnopqrstuvwxyz')
if char in lowercase: ...
dict([key1, key2, key3, key1]).keys() # eliminate duplicate keys
Raymond Hettinger
'regnitteh dnomyar'[::-1]
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